| Acronym | Meaning |
| O | Oberst - Observer - Obstacle - Octal - Officer - Official - Oh - Operational - Operator - Oprah (magazine) - Outstanding -Oxygen |
| WZ | Swaziland (FIPS 10-4 Country Code) |
| PYF | French Polynesia (ISO 3166 Trigram) |
| NETWARS | Network Warfare Simulation |
| VFMO | Very Fast Moving Object (astronomy) |
| HIM | His (or Her) Imperial Majesty |
| KA | Kamov Design Bureau |
| PF | Picofarad |
| XH | Xhosa Language (ISO 639-1 Code) |
| LN | Lingala Language (ISO 639-1 Code) - Natural Logarithm |